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Method for recycling silver and copper from silver-copper alloy scrap

A silver-copper alloy and waste technology, applied in the field of alloy waste recycling, can solve the problems of a large amount of flue gas, waste liquid, high consumption of reagents and high processing cost, and achieve the effects of less environmental pollution, high product quality and simple process

Active Publication Date: 2010-12-15
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method is complicated in process, consumes a lot of energy, consumes a lot of reagents, produces a lot of flue gas and waste liquid during production, and has high treatment costs.

Method used

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  • Method for recycling silver and copper from silver-copper alloy scrap
  • Method for recycling silver and copper from silver-copper alloy scrap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) The silver nitrate solution with a silver ion concentration of 180g / L is used as the electrolyte, the electrolyte is loaded into the electrolytic cell, the titanium plate is used as the cathode, and the AgCu 10 Alloy scrap loaded into titanium anode basket as anode, AgCu 10 The amount of alloy waste added is 10Kg / 50L electrolyte, and the current density at the cathode is 200A / m 2 , the cell voltage is 2.2V under the condition of electrification electrolysis;

[0018] (2) Add an appropriate amount of AgCu to the titanium anode basket every 6 hours during the electrolysis process 10 Alloy Scrap, AgCu 10 The copper in the alloy waste continuously enters the electrolyte in the form of ions to obtain a copper-containing electrolyte. Every 12 hours, a titrator is used to analyze the concentration of silver ions and copper ions in the copper-containing electrolyte, and a pH meter is used to analyze the pH value of the copper-containing electrolyte. It is 180g / L to contr...

Embodiment 2

[0022] (1) The silver nitrate solution with a silver ion concentration of 200g / L is used as the electrolyte, the electrolyte is loaded into the electrolytic cell, the titanium plate is used as the cathode, and the AgCu 20 Alloy scrap loaded into titanium anode basket as anode, AgCu 20 The amount of alloy waste added is 60Kg / 50L electrolyte, and the current density at the cathode is 400A / m 2 , the cell voltage is 2.5V under the condition of electrification electrolysis;

[0023] (2) Add an appropriate amount of AgCu to the titanium anode basket every 24 hours during the electrolysis process 20 Alloy Scrap, AgCu 20 The copper in the alloy waste continuously enters the electrolyte in the form of ions to obtain a copper-containing electrolyte. Every 72 hours, a titrator is used to analyze the concentration of silver ions and copper ions in the copper-containing electrolyte, and a pH meter is used to analyze the pH value of the copper-containing electrolyte. It is 200g / L to cont...

Embodiment 3

[0027] (1) The silver nitrate solution with a silver ion concentration of 190g / L is used as the electrolyte, the electrolyte is loaded into the electrolytic cell, the titanium plate is used as the cathode, and the AgCu 28 Alloy scrap loaded into titanium anode basket as anode, AgCu 28 The amount of alloy waste added is 50Kg / 50L electrolyte, and the current density at the cathode is 300A / m 2 , the cell voltage is 2.35V under the condition of energized electrolysis;

[0028] (2) Add an appropriate amount of AgCu to the titanium anode basket every 15 hours during the electrolysis process 28 Alloy Scrap, AgCu 28 The copper in the alloy waste continuously enters the electrolyte in the form of ions to obtain a copper-containing electrolyte. Every 42 hours, a titrator is used to analyze the concentration of silver ions and copper ions in the copper-containing electrolyte, and a pH meter is used to analyze the pH value of the copper-containing electrolyte. It is 190g / L to control t...

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Abstract

The invention relates to a method for recycling silver and copper from silver-copper alloy scrap. The method comprises the following steps of: 1, performing electrolysis by taking a titanium plate as a cathode, the silver-copper alloy scrap which is loaded into a titanium anode basket as an anode and the solution of silver nitrate as electrolyte; 2, recycling electrolytic silver powder; 3, heating electrolyzed copper-containing electrolyte to decompose copper nitrate into copper oxide, adding water for dissolving the obtained product, then filtering the dissolved solution to obtain the solution of the silver nitrate and copper oxide powder and recycling the copper oxide powder; and 4, returning the solution of the silver nitrate obtained by the step 3 to an electrolytic bath and recycling the solution of the silver nitrate serving as the electrolyte. In the method, an electrolysis process is combined with a purification process; the silver and the copper are separated and purified; and the copper is recycled in the form of the copper oxide. Compared with the conventional processes of dissolving materials by using nitric acid, immersing the silver by chlorination and reducing by using a reducing agent, the method has the advantages of simple process, low cost, high product quality and light environmental pollution.

Description

technical field [0001] The invention belongs to the field of alloy scrap recycling, and in particular relates to a method for recycling silver and copper in silver-copper alloy scrap. Background technique [0002] Silver-copper alloys are mainly used in the fields of solders, contacts and other materials. The processing and production of alloys will produce a certain amount of scraps, which need to be recycled, purified and recycled. The traditional method of recycling silver-copper alloy scraps is as follows: silver-copper alloy is dissolved in nitric acid, silver chloride is precipitated, and reducing agent is reduced, and then the silver powder is smelted and cast into ingots and then electrolyzed; Silver nitrate electrodeposition to recover silver. The above method has complicated process, high energy consumption and high consumption of reagents, produces a large amount of flue gas and waste liquid during production, and has high treatment costs. Contents of the inven...

Claims

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Application Information

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IPC IPC(8): C25C1/12C25C1/20
CPCY02P10/20
Inventor 阎应科刘增方贺慧张见卓张骥郑学军唐进
Owner 西安诺博尔稀贵金属材料股份有限公司
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